"Compaq.com - Compaq Presario Series Maintenance and Service Guide - Models : 1246, 1277, 1278, and 1279
64-MB
64-MB 128-MB
64-MB
128-MB 192-MB
Diskette Drive
Diskette Drive
Diskette Size
Light
Height
3.5 in
None
.5" / 1.27 cm
Bytes per Sector:
Sectors per Track
High Density
Low Density
512
18 (1.44-MB) / 15 (1.2-MB)
9
Tracks per Side
High Density
Low Density
80 (1.44-MB) / 80 (1.2-MB)
80
Access Times
Track-to-Track (high/low)
Average (ms)
Setting Time (ms)
Latency Average
3 ms/6 ms
94 ms/174 ms
15 ms
100
Number of Read/Write Heads
2
Hard Drive
Hard Drives
4.3-GB 4.8-GB
Capacity Per Drive
4.3-GB 4.3-GB
Drive Type
2.5" 2.5"
Logical Configuration
Cylinders
Heads
Sectors per track
Bytes per sector
8647
6
240-250
512
11648
4
330 (max.)
512
Seek Times
(Typical, Including settling in ms)
Single Track
Average Maximum
Full Stroke
2.5 ms
---
12
---
2.5 ms
5.5 max (read)
6.5 max (write)
16 max (read)
17 max (write)
30 max (read)
31 max (write)
Transfer Rate
At interface
33.3 MB/s 33.3 MB/s
Sector Interleave
1:1 1:1
Buffer Size
512 KB 512 KB
CD Drive
file:///C|/SERVICE%20MANUALS/COMPAQ%20_%20chec...20SERIES%201246%201277%201278%201279/spec.html (7 of 9)6/27/2004 2:33:35 AM
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